Dextromethorphan is one of the active ingredients that can be found in many over-the-counter cold and cough medicines. This drug, however, also acts as a dissociative hallucinogenic drug when taken in excess dosages.

Ketamine is a tranquilizer that is most commonly used on animals. Recreational drug users, however, has found other uses for it. Today, Ketamine, along with other club drugs, is quite popular among teens and young adults at dance clubs and raves.

Lysergic acid diethylamide or LSD is a hallucinogen classified as of the psychedelic type. First synthesized by Swiss chemist Albert Hofmann, LSD, also known as acid, is one of the most widely known psychedelic drugs of all time.

Mescaline is a psychedelic alkaloid that is mainly used as a recreational drug. It occurs naturally in some types of cactus. Illegal in the Unittied States, it is nevertheless widely used among certain Native American tribes.

There is a type of mushrooms that are used for recreational drug use. Commonly known as magic mushrooms, these fungi have psychedelic properties, owing to its active ingredients, psilocybin and psilocin.

PCP, or phencyclidine was initially an anesthetic first patented by Parke-Davis in 1952. Its many side effects led to its discontinuation even for use in animals. Addicts, however, have found recreational uses for the drug, which is also known as angel dust.

Native Americans have been using the peyote cactus for ritual religious and medicinal purposes for a long time. But its psychoactive alkaloids, particularly mescaline, have led drug users to use and abuse the peyote as a recreational drug.